Civilian Version Bi-Level Slimline, for 5.56 cal. Carbine length M4's. Fits flat-top equipped weapons with carbine length gas systems. The #50 is a slim line S.I.R. ® featuring a bi-level top dovetail rail. The forward rail section is lowered to allow co-witnessing of heads up display type optics when used in conjunction with our #40 series rear sights and a standard height front sight post. This civilian version requires no modification to the weapon.
Wt. 14.5 oz*
*Wt. measured w/o 1,2,3 rails and sling swivel which are included with the SIR system. Rails can be removed/added as needed.
